...what is the Mac Pros PSU ? Please, keep it as simple as possible for me, im not too well informed in the area of computers. I know much more than your average person, but probably less than the people on these boards. Will any GPU I throw at my (Soon to be) mac pro be sufficiently powered ? Im talking power draining cards, like nVidias new generation of GPUs (8xx0) Or will I need some kind of new device ? And if it will handle these cards, will it handle new GPUs for a long time to come, or will there be a point in a year or two where I will need to replace my PSU in order to use the latest GPUs ?